axel backsteom



(No Model.)

C; A. BACKSTROM. GBNTRIPUGALALIQUID SEPARATOR. No. 368,045. Patented Aug. 9, 188'7.

WW1/wooo@ Jff@ WQ@ www skimmingpipe FFICE@ ATnNr C. AXEL BACKSTROM, OF TRENTON, NEW JERSEY, ASSIGNOR TO THE BACK- STROM CENTRIFUGAL SEPARATCR COMPANY, OF NEW JERSEY.

CENTRIFUGAL LIQUID-SEPARATOR.

` SPECIFICATION forming part of Letters Patent No. 368,045, dared August e, 1887.

Application filed January 15, 18S?. Serial No. 934,463.

.T0 @ZZ whom it may concern:

Be itknown that l, C. AXEL BA'cKsTRoM, a citizen of the United States, residing at Trenton, in the countyof Mercer, State of New Jersey, have invented certain new and useful Improvements in Centrifugal LiquidSepara tors, of which the following is a specification, reference being had therein to the accompanying drawings. This invention has relation to centrifugal machines of that class which are designed for the separation of liquids `having constituents of different specific gravity, and although herein specified as'for the purpose of separating cream from milk, the invention is not limited to any particular use of the same.

. The object of the invention is, among'other things, to produce a centrifugal machine of the class described which shall be adapted for the unobstructed passage from the separating bowl or chamber of the constituent having the lightest specific gravity-that is, solely by action of gravity.

Another object in view is to produce a inaehine all the parts of which are accessible for cleaning purposes.

AOther objects and advantages will appear in the following description, and the novel features of the invention will be particularly pointed out in the claims.

Referring to the drawings, Figure lis a central vertical section of a separating-bowl and its spindle and their accessories constructed in accordance with my invention. Fig. 2 is a horizontal section on the line fr :t of Fig. l.

Like letters indicate like parts in both iigures.

A represents the bowl of a centrifugal machine, Which is provided at its bott-om with a central depending hub, A', and an annular receptacle, A2, embracing the hub-that is, formed as a depending flange from the bottomand provided with an inwardlyprojecting flange, A3, terminating a distance from the hub A' sufficient for the introduction of a I designate the part just described as a discharge-receptacle, because it is intended for the reception of the skimmed milk, which is discharged from the bowl-in a manner hereinafter described. At the top of the bowl A is a supply-vessel, C, which in this instance is (No model.)

provided with an aperture, C', and is screwthreaded or otherwise set into the bowl, and has a dischargelpipe, C2, projecting radially into the bowl.

D represents a series of vertical blades, all 0f which, excepting one, D', havea single port, D2, the port D'z of one blade being at the lower outer corner thereof and the port of the neXt succeeding blade being at the upper outer corner thereof, and so on throughout the entire series, the blade D', however, as above stated, having no port whatever.

The supply-pipe C2 from the supply-vessel C is arranged at one side of the imperforate blade D'. A discharge-pipe, E, is arranged with its receiving end near the inner wall and top of the bowl at the opposite side of the imperforate blade D', to which it is soldered or otherwise secured, while its delivery end communicates with the discharge-receptacle A2. The discharge-pipe E passes at one side of the center of the drurn, as clearly shown in Fig. 2.

F represents the bowl-spindle, and itis hollow, as at E', so as to form a chamber communicating with the bowl and depending below the inner surface of its bottom, and is provided with a discharge-port, F2. The hollow spindle constitutes a chamber which has no other outlet than the port F2, so that the action of gravity alone will till (or keep partly filled) the same with cream, and the weight of the cream collected therein 'will force the same out of the discharge-port without necessarily requiring any other or extraneous means for that purpose.

I have herein described the spindle F as a hollow spindle, and I desire it understood as meaning a spindle having a chamber, as E', in its upper end, the solid contiguous lower portion of the spindle serving as the bottom of said chamber. In this manner I distinguish my spindle fro m those hitherto employed, each of which was hollow throughout the entire length thereof and delivered a liquid longitudinally therethrough.

Grepresents the guide or-bearing for the spindle, and is retained in position by a rubber or other elastic or yielding cushion, G', embracing the bearing and resting in a portion, H, of any suit-able frame-work. The bearing G is extended upwardly, as at G2,'and

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is otherwise constructed at its top in the form of a cream-receiver, G, having a dischargespout, G4. The dischargeorifice of the cham ber or hollow portion F of the spindle communicates with the cream-receiver G.

rIhis being the eonstruetion,the operation of my invention is as follows: Milk being supplied to the vessel C continuously in accordance with the discharge of cream and milk from the bowl, there is produced during the rotation of the bowl a current from the discharge-pipe G2 toward the next vertical blade in the series, which is provided with a port, D2, through said port to the next blade, and through ils port at its top, and so ou th rough the series, the current passing from the top to the bottom and from the bottom to the top of the bowl until it impinges against the imperforate blade D', when the milk (from which, during its passage through thebowl, the cream has been separated and formed in an annular body, as, at the center ofthe bowl) passes into the receiving end of the dischargepipe andis delivered into the discharge-receptacle A, from which it is skimmed by the pipe B during the rotation of the bowl. Centrifugal force causes the skimmed milk in the receptacle A2 to assumean annular form, as indicated by thedotted lines Y. As soon as the annular-body of cream reaches the point of intersection of the hollow shaf t with the bottom of the bowl it falls down the inner wall thereof, and finally is dis charged through the port FL into the cream-receiverG, and from thence through the pipe G4 into any suitable receptacle. Now, it will be noticed that the supply-vessel C maybe removed from the bowl and that thelatter is accessible in all its parts for cleaning purposes, as also is the hollow spindle, and by lifting the bowl and spindle from its bearing the cream-receiver, formed as a part ofthe latter, is also accessible for cleaning purposes; and, finally, the discharge-vessel, being arranged outside of the bowl, although attached thereto or formed as a part thereof, is also more readily accessible for cleaning purposes than if formed within the bowl.

I deem an unobstructed delivery of the cream laterally bythe port F2 through the hollow shaft one ofthe essential features of this invention, and in this regard I do not limit my invention to a use of the particular blades or to the 4particular milk-discharge embodied therein, in this instance, as other well-known constructions for the primary separation of the cream from the milk may be embodied in the bowl, so long as the cream forms an annular body near the center of the bowl.

That I claim is- 1. In a centrifugal machine, a separating bowl or chamber having an outer annular discharge-receptacle, and a discharge-pipe eX- tending from near the inner wall of they bowl or chamber and communicating with saidreceptacle, and the depending chambered spindle provided with a lateral dischargeport, substantially as specified.

2. ln a centrifugal machine, a separating bowl or chamber having an outer annular discharge-receptacle, and a discharge-pipe extending from near thc inner wall of the bowl or chamber and communicating with said receptacle, and a depending chambered spindle provided with a lateral discharge-port, in colnbination with a skimming-pipe, substantially as specified.

3. In a centrifugal machine, a separating bowl or chamber having an outer annular discharge-receptacle, and a discharge-pipe extending from near the inner wall of the bowl or chamber and communicating with said receptacle, and a depending chambered spindle provided with a lateral discharge port, in combination with a cream-receiver embracing the spindle and provided with a dischargepipc, substantially as specified.

4. In a centrifugal machine, the combination of a separating bowl or vessel having a series of vertical blades, one of which is imperforate, an outer annular discharge-receptacle, and a discharge-pipe communicating therewith, with the depending chambered spindle eonnnunicating with the bowl and provided with a discharge-port, and a receptacle embracing the spindle and having a discharge-pipc, substantially as specified.

5. The separating-bowl A', having at its bottom the hub A and the depending annular inwardlyilanged dischargereceptacle A?, and a pipe, E, arranged within and at one side of the center of the bowl to communicate with the said receptacle, substantially as specified.

6. The combination, with the bowl A, having the vertical blades D, each provided with a port, D2, and the imperforate blade D', of a discharge-pipe, It, and a depending chambered spindle, F, having the lateral discharge-port F", substantiall y as specified.

7. In a centrifugal machine, the combination, with the separating-bowl, of a depending chambered spindle, each having unobstructed communication with the other and cach having a discharge-opening, that of the spindle heilig laterally disposed, whereby an annular body of a lighter constituent may be delivered by gravity from the bowl directly into the spindle, substantially as specified.

S. The combination, with the bowl of a centrifugal machine, of a depending chambered spindle having unobstructed communication with that part of the bowl into which a lighter constituent of a liquid is collected by the action of centrifugal f'orcc in separating it from a heavier constituent, and having adischarge-port extending laterally through the wall ofthe spindle, substantially as specified.

In testimony whereof [affix mysignature in presence of two witnesses.

C. AXEL BACKS'ITROBI.

Vitncsses:

E. 3. S'rockiNo, W. Slimmer DUVALL.

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